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Date: Thu, 20 Feb 2014 10:11:46 -0800 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Torvald Riegel <triegel@...hat.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Will Deacon <will.deacon@....com>, Peter Zijlstra <peterz@...radead.org>, Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>, David Howells <dhowells@...hat.com>, "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "mingo@...nel.org" <mingo@...nel.org>, "gcc@....gnu.org" <gcc@....gnu.org> Subject: Re: [RFC][PATCH 0/5] arch: atomic rework On Thu, Feb 20, 2014 at 06:54:06PM +0100, Torvald Riegel wrote: > xagsmtp4.20140220175519.1127@...dvm6.vnet.ibm.com > X-Xagent-Gateway: vmsdvm6.vnet.ibm.com (XAGSMTP4 at VMSDVM6) > > On Thu, 2014-02-20 at 00:30 -0800, Paul E. McKenney wrote: > > Well, all the compilers currently convert consume to acquire, so you have > > your wish there. Of course, that also means that they generate actual > > unneeded memory-barrier instructions, which seems extremely sub-optimal > > to me. > > GCC doesn't currently, but it also doesn't seem to track the > dependencies, but that's a bug: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59448 Ah, cool! Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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